Shelter Protocol is a protocol for building end-to-end encrypted, federated web applications.
Think Signal's end-to-end encrypted capabilities but instead of just having text messages to exchange, you can have any kind of data; which means you can build any kind of application that supports end-to-end encryption natively.
Group Income is a software that facilities basic Income for friends and family in a decentralised and end-end-encrypted way. It is built using Shelter and chelonia.js (library that implements the protocol in JavaScript).